Lime kiln desulfurization and denitration system

Abstract

The invention relates to the technical field of desulfurization and denitrification, and specifically relates to a lime kiln desulfurization and denitration system, which includes an integrated desulfurization-denitration column. The integrated desulfurization-denitration column is connected to a flue through a joint. An active molecular tank and a pre-desulfurizer tank are arranged above the flueand are connected to the inside of the flue through pipelines, and spraying guns which are set as active molecular spraying guns and pre-desulfurizer spraying guns are arranged in the flue. The system further comprises a limestone slurry tank containing limestone slurry. The limestone slurry tank is connected to the inside of the flue through a pipeline, and limestone slurry is sprayed through nozzles. The limestone slurry nozzles are disposed between the pre-desulfurizer spraying guns and the joint. The lower part of the column is connected to a humidification system through a pipeline. Thehumidification system extends into the column through a pipeline and is provided with a humidification spray gun to spray humidification liquid. The humidification liquid can make the flue gas wet andincrease the weight of the flue gas. The connection point of the column and the joint is provided with a venturi tube.

Description

technical field [0001] The invention relates to the technical field of desulfurization and denitrification, in particular to a lime kiln desulfurization and denitrification system. Background technique [0002] In the sulfur acid system, the waste gas produced contains a large amount of sulfur. In order to make the sulfur content in the discharged gas meet the national standard, desulfurization and denitrification must be carried out. The effect of traditional desulfurization and denitrification devices is not ideal, such as desulfurization of activated carbon by water washing, but the ratio of activated carbon and the by-products caused by each washing are not easy to handle. [0003] At present, there is no mature technology for desulfurization and denitrification in the limestone roasting industry. In order to make up for the environmental protection gap in this industry, and combine existing technologies and innovate to meet environmental protection requirements, it is n...

AI Technical Summary

Problems solved by technology

The effect of traditional desulfurization and denitrification devices is not ideal, such as desulfurization of activated carbon by water washing, but the ratio of activated carbon and the by-products caused by each washing are not easy to handle

[0003] At present, there is no mature technology for desulfurization and denitrification in the limestone roasting industry. In order to make up for the environmental protection gap in this industry, and combine existing technologies and innovate to meet environmental protection requirements, it is necessary to design a lime kiln desulfurization and denitrification system.

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